Well, this is a bit of an experiment, but it makes me laugh every time I hear her!
She said something the other day that sounded a bit like "mama," so I praised her and coaxed her to do it again. This is what we're working on now...
She has the two-syllable part down. Only problem now is that she sounds like a 70-year-old chain smoking male!
We're working on refining her tone and pitch.